Sample processing device for cotton detection

Abstract

The invention relates to the technical field of cotton processing devices, in particular to a sample processing device for cotton detection. Comprising a machine body, a power assembly is arranged on the left side of the machine body, the right end of the power assembly is located in the machine body, a plurality of elastic metal strips are evenly arranged at the right end of the power assembly in the circumferential direction, a plurality of air supply parts are arranged at the bottom of the machine body, a discharging pipe communicated with the interior is arranged on the right side of the machine body, and cleaning assemblies are symmetrically arranged at the discharging pipe; a dispersing assembly is arranged at the top of the machine body; cotton is blown up and is matched with vibration of the dispersing assembly, cotton loosening operation is achieved, cotton seeds and cotton branches are separated stably and rapidly, after separation, the cotton seeds and the cotton branches are grabbed into the discharging pipe through the metal strips, workers can take the cotton seeds and the cotton branches according to needs, and use is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of cotton processing devices, and in particular to a sample processing device for cotton detection. Background Art

[0002] With the need for global geopolitical security, the determination of the origin of crops has become very important. Cotton, as a common material in the fields of textiles, clothing, and medical treatment, has a high application value. At present, for the traceability of the origin of cotton, cotton samples from different origins around the world are selected as research objects. After the cotton samples are digested with nitric acid, the 56 mineral elements in the cotton are determined using an ICAPQ inductively coupled plasma mass spectrometer. The results of the mineral element determination are analyzed using chemometric methods such as cluster analysis and discriminant analysis. According to the characteristics of the mineral element content of cotton in different regions, cotton from different origins is distinguished.

[0003] Before the experiment, in the raw material preparation stage, the cotton needs to be pre-processed to remove the debris inside the cotton, such as cotton seeds, cotton branches, etc., to ensure the cleanliness of the cotton. At present, the processing of cotton is mostly done by manual removal with handheld tweezers, which has low operating efficiency and is not convenient for manual collection and use. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a sample processing device for cotton detection in response to the above-mentioned technical deficiencies. The device can loosen the cotton by blowing up the cotton and vibrating the dispersion component to complete the separation of cotton seeds and cotton branches in a stable and fast manner. After separation, the cotton is grabbed into a discharge pipe through a metal bar, and the staff can take it as needed for easy use.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention includes: A machine body, a power assembly is provided on the left side of the machine body, the right end of the power assembly is located inside the machine body, and a plurality of elastic metal strips are evenly provided along the circumferential direction, a plurality of air supply parts are provided at the bottom of the machine body, a discharge pipe connected to the interior is provided on the right side of the machine body, a cleaning assembly is symmetrically provided at the discharge pipe, and a dispersion assembly is provided on the top of the machine body.

[0006] Preferably, the power assembly includes a driving shaft and a sliding sleeve; one end of the driving shaft is provided with a control motor connected to the machine body, and the other end extends into the discharge pipe, and an adjusting rod is provided on the machine body above the driving shaft; the sliding sleeve is slidably connected to the driving shaft, and the left end is provided with an intermediate piece connected to the adjusting rod, and the right end is fixedly connected to the metal bar.

[0007] Preferably, a baffle is provided at the right end of the sliding sleeve, the baffle is close to the left end of the metal strip, and the diameter of the baffle is equal to the diameter of the discharge pipe.

[0008] Preferably, a plurality of mounting channels are provided at the bottom of the machine body; the air supply portion includes a base and a support bar; the base is fixed in the mounting channel, and a plurality of air outlets are evenly provided above the base; a plurality of support bars are used and are arranged at the blanking port of the mounting channel, and the cross-sectional shape of the support bar is circular.

[0009] Preferably, slag discharge ports are provided at both sides below the installation channel, and a guide slope is provided on the base.

[0010] Preferably, the lower surface of the interior of the body is semicircular, and rotatable buckle plates are provided on both sides.

[0011] Preferably, the dispersion component includes a first hydraulic cylinder and a cross-bracing plate; the first hydraulic cylinder is installed on the top of the machine body, and the push rod is connected to the top of the cross-bracing plate; two air chambers are symmetrically arranged on the cross-bracing plate, each of the air chambers is provided with air holes, a plurality of elastic rope bodies are arranged on the cross-bracing plate, and a triggering member for triggering the vibration of the rope body is arranged in the middle of the cross-bracing plate.

[0012] Preferably, the trigger member includes a hammer plate and a power motor; a force column and a sliding column are respectively provided above the hammer plate, the sliding column is slidably connected to the cross brace plate, and a spring is sleeved on the sliding column; the power motor is installed above the cross brace plate, and a convex disk in contact with the top of the force column is provided on the power motor.

[0013] Preferably, a sliding channel is symmetrically provided at the discharge pipe; the cleaning assembly includes a second hydraulic cylinder and a shell; the second hydraulic cylinder is installed at the outlet end of the sliding channel, and is fixedly connected to the shell at the push rod; the working surface of the shell is an arc surface, and a plurality of flexible scrapers are evenly provided along the arc surface.

[0014] Preferably, a liquid supply cavity and an air supply cavity are respectively provided inside the shell, and the liquid supply cavity is provided with a plurality of liquid outlets; the air supply cavity is provided with a plurality of connecting holes, and the liquid outlets and connecting holes are distributed between the scraping strips.

[0015] Compared with the prior art, the present invention has the following advantages: The upward airflow is generated by the air supply part, driving the cotton to contact the dispersion component, and the high-frequency vibration of the rope body is used to hit the cotton to achieve the effect of shaking it apart, thereby separating and dropping the internal cotton seeds and cotton branches. It is convenient and efficient, and can meet the cleaning operation of large quantities of cotton, effectively shortening the preparation time and improving work efficiency; In the cotton separation operation, driven by the metal strip power assembly, some of the cotton that cannot be lifted can be lifted up by rotation, ensuring the cleaning quality of the cotton and meeting the experimental requirements. After the separation is completed, the cotton inside the machine body can be gathered into the discharge pipe by moving back and forth. The structural design is reasonable and ingenious, and the internal structure design is simplified. When the metal strip gathers the cotton, the cleaning component can prevent the cotton from adhering to the metal strip and causing residue by assisting the clamping of the metal strip, thus ensuring the cleanliness of the metal strip itself. The liquid supply chamber design in the shell can spray the collected cotton with experimental liquid as needed to moisten it, simplifying the construction steps and avoiding the possibility of drifting. The structural design of the air supply chamber can extract the cotton under negative pressure during the cleaning process, making it convenient to remove the cotton on the metal strip, and can also generate high-pressure airflow to clean the discharge pipe, scraper strip and metal strip. It has various functions and meets different usage conditions. The guide slope on the air supply part cooperates with the slag discharge port on the installation channel to discharge the separated debris out of the machine body, ensuring the stable operation of the structure. The design of the support bar supports the cotton to prevent it from falling out and wasting, while not affecting the falling of debris. 6. The design of the snap-fit ​​plate allows the cotton to be gathered in the middle area by flipping the two snap-fit ​​plates when cleaning the cotton, which is convenient for the operation of the metal strip and avoids the occurrence of residue. At the same time, it guides the cotton during the separation operation and forms a circulating blowing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the overall structure of a sample processing device for cotton testing; Figure 2 It is a schematic diagram of the layout of the power components; Figure 3 It is a schematic diagram for the installation of dispersed components; Figure 4 It is a schematic diagram of the internal structure of the machine; Figure 5 This is a schematic diagram of the structure at the installation channel; Figure 6 is a schematic diagram of the base structure; Figure 7 It is a schematic diagram of the structure below the cross brace plate; Figure 8 It is a schematic diagram of the trigger structure; Fig. 9 This is a schematic diagram of the structure of the discharge pipe; Fig.10 is a schematic diagram of the shell structure; Fig.11 Schematic diagram of the internal structure of the shell; Fig.12 Schematic diagram of the metal strip layout.

[0017] In the figure: 1, machine body; 2, power assembly; 3, metal strip; 4, air supply unit; 5, cleaning assembly; 6, dispersion assembly; 7, trigger; 101, discharge pipe; 102, installation channel; 103, slag discharge port; 104, buckle plate; 105, sliding channel; 201, driving shaft; 202, sliding sleeve; 203, control motor; 204, adjustment rod; 205, middle piece; 206, baffle; 401, base; 402, support bar; 403 , air outlet; 404, guide slope; 501, second hydraulic cylinder; 502, shell; 503, scraper; 504, liquid supply chamber; 505, air supply chamber; 506, liquid outlet; 507, connecting hole; 601, first hydraulic cylinder; 602, cross brace; 603, air chamber; 604, air hole; 605, rope body; 701, hammer plate; 702, power motor; 703, force column; 704, sliding column; 705, spring; 706, convex disc. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0019] Specific implementation method 1: Combination Figure 1-12 As shown, a sample processing device for cotton detection comprises: a body 1, a power assembly 2 is arranged on the left side of the body 1, the right end of the power assembly 2 is located inside the body 1, and a plurality of elastic metal strips 3 are evenly arranged along the circumferential direction, a plurality of air supply parts 4 are arranged at the bottom of the body 1, a discharge pipe 101 communicating with the inside is arranged on the right side of the body 1, a cleaning assembly 5 is symmetrically arranged at the discharge pipe 101, and a dispersion assembly 6 is arranged on the top of the body 1; wherein the metal strip 3 is made of a material with elastic deformation and good reset function, such as spring steel or other memory metals.

[0020] A preferred embodiment, in combination with Figure 1-4As shown, the power assembly 2 includes a driving shaft 201 and a sliding sleeve 202; the left end of the driving shaft 201 is connected to the left rotating shaft of the body 1, and the end is connected to a control motor 203, and the right end extends into the discharge pipe 101, and an adjusting rod 204 is installed on the body 1 above the driving shaft 201, and the surface of the adjusting rod 204 is processed with threads, and both ends are connected to the rotating shaft of the body 1, and a motor is installed at one end, and a guide rod is fixed below the driving shaft 201; the sliding sleeve 202 has a plurality of sliding grooves inside, and the driving shaft 201 has a plurality of sliding strips, and the two are connected to form a sliding connection similar to a spline, and the left end of the sliding sleeve 202 is sleeved with an intermediate piece 205 connected to the adjusting rod 204, forming a sliding connection with the driving shaft 201. The sliding sleeve 202 is rotatably connected, and the middle piece 205 is threadedly connected to the adjusting rod 204 at the top and slidably connected to the guide rod at the bottom, and multiple metal strips 3 are fixed at the right end; the adjusting rod 204 is driven to rotate by the motor, and the middle piece 205 is used to realize the driving displacement of the sliding sleeve 202, and the active shaft 201 drives the sliding sleeve 202 to rotate. During the movement, it can also rotate, so as to complete the gathering of cotton, or during the separation process, the cotton is lifted. The structure is stable and ingenious. The specific lifting process is that by driving the sliding sleeve 202 to rotate, the metal strip 3 opens under the action of the rotating centrifugal force, and the end is close to the installation channel 102, so as to realize the lifting of the cotton, and reset the deformation after the rotation stops.

[0021] A preferred embodiment, in combination with Figure 4 As shown, a baffle 206 is provided at the right end of the sliding sleeve 202. The baffle 206 is arranged near the left end of the metal strip 3, preferably at a distance of 2-4 cm, and the diameter of the baffle 206 is equal to the diameter of the discharge pipe 101, so that the discharge pipe 101 can be closed, facilitating the subsequent cleaning operation of the internal parts by the cleaning assembly 5.

[0022] A preferred embodiment, in combination with Figure 4-6 As shown, a plurality of mounting channels 102 are processed at the bottom of the machine body 1; the air supply part 4 includes a base 401 and a support bar 402; the base 401 is fixed in the mounting channel 102, and a plurality of air outlets 403 are evenly arranged above the base 401, and a pipe opening connected to the air supply device is provided below; a plurality of support bars 402 are used, and multiple layers are arranged along the blanking port of the mounting channel 102, and at least two layers are provided to prevent cotton from falling by mistake. The cross-sectional shape of the support bar 402 is circular, and the material is selected to be made of relatively soft natural rubber. At the same time, the diameter of the support bar 402 should not be too large, preferably 0.5-1 cm, so as to form a structure similar to fluff, which can support lighter cotton, while cotton branches and cotton seeds can fall due to the gaps between the support bars 402 or deformation under the action of gravity, which is safe and reliable.

[0023] A preferred embodiment, in combination with Figure 5As shown, slag discharge ports 103 are provided at both sides below the installation channel 102, and guide slopes 404 are provided on the base 401. The guide slopes are located at the lower surface of the slag discharge ports 103, so that subsequent debris can be discharged from the slag discharge ports on both sides.

[0024] A preferred embodiment, combined with Figure 6 As shown, in order to facilitate the falling out of debris, the upper surface of the base 401 can be processed into an arc-shaped surface to facilitate the debris to slide down to the guide slopes on both sides of the base 401.

[0025] A preferred embodiment, combined with Figure 4 As shown, the lower surface of the interior of the body 1 is semicircular, which is convenient for gathering the cotton in the middle area and for the subsequent metal strip 3 to lift up the cotton that cannot be blown up. At the same time, rotatable snap-fit ​​plates 104 are provided on both sides of the semicircular space, and the snap-fit ​​plates 104 are driven by the third hydraulic cylinder; in the separation stage, the inclined snap-fit ​​plates 104 can guide the cotton that falls to both sides to the middle area, and when the cotton needs to be gathered later, the two snap-fit ​​plates 104 can be flipped toward the middle, thereby reducing the range of movement of the cotton, making it convenient for the metal strip 3 to drive it into the discharge pipe 101, and effectively avoiding the problem of residue.

[0026] A preferred embodiment, combined with Figure 3 , Figure 7 and Figure 8 As shown, the dispersion component 6 includes a first hydraulic cylinder 601 and a cross brace plate 602; the first hydraulic cylinder 601 is installed on the top of the body 1, and the push rod of the first hydraulic cylinder 601 is fixedly connected to the top of the cross brace plate 602. The four sides of the cross brace plate 602 are in contact with the inner wall of the body 1 to form a sliding connection, thereby improving the displacement stability and reducing the air leakage; two air chambers 603 are symmetrically arranged on the lower surface of the cross brace plate 602, and air holes 604 are arranged on the air chambers 603, which are connected to the air supply device at the top, and multiple elastic ropes 605 are arranged on the lower surface of the cross brace plate 602, and the ropes 605 are close to the air chambers 603 to save internal space. A triggering member 7 for triggering the vibration of the rope body 605 is provided in the middle of 02. When the air supply part 4 below blows up the cotton and contacts the rope body 605, the triggering member 7 drives the rope body 605 to generate high-frequency vibration to achieve the breaking and separation operation. At this time, the air chamber 603 is connected with the outside, and the upward airflow enters through the air hole 604 and is then discharged, so that the cotton can contact the rope body 605 upward. When the separation is completed, the rope body 605 can continue to vibrate, and the air hole 604 generates a downward airflow to achieve the cleaning of the rope body 605 and the dredging of the air hole 604 itself. Among them, the rope body 605 is preferably made of cow tendon rope, or other metal wires that can generate high-frequency vibration.

[0027] A preferred embodiment, combined with Figure 8As shown, the trigger member 7 includes a hammer plate 701 and a power motor 702; a force column 703 and a sliding column 704 are respectively arranged above the hammer plate 701, the sliding column 704 is used in pairs and is slidably connected to the cross brace plate 602, and a spring 705 is sleeved on the sliding column 704, and the force column 703 is located in the middle of the two sliding columns 704 to maintain the stability of the structure; the power motor 702 is installed above the cross brace plate 602, and a convex disk 706 in contact with the top of the force column 703 is arranged on the power motor 702, and the force column 703 is pushed downward by the convex disk 706 to overcome the elastic force of the spring 705, so as to realize the collision of the rope body 605, thereby generating high-frequency vibration, and after the collision, it is quickly reset by relying on the elastic force of the spring 705 to avoid affecting the vibration of the rope body 605.

[0028] A preferred embodiment, combined with Fig. 9 and Fig.10 As shown, a sliding channel 105 is symmetrically provided at the discharge pipe 101; the cleaning component 5 includes a second hydraulic cylinder 501 and a shell 502; the second hydraulic cylinder 501 is installed at the outlet end of the sliding channel 105, and the push rod of the second hydraulic cylinder 501 is fixedly connected to the shell 502; the working surface of the shell 502 is an arc surface, and a plurality of flexible scraping strips 503 are evenly provided along the arc surface, and the scraping strips 503 are made of rubber material, and the scraping strips 503 are pushed by the second hydraulic cylinder 501 to contact the metal strip 3, so as to form a partial covering of the metal strip 3, and in the process of the metal strip 3 returning to the left, the lint adhering to the metal strip 3 is scraped off to avoid residue, wherein the scraping strips 503 are preferably selected to have a circular cross-section for convenient processing and manufacturing, and at the same time, with scraping strips 503 of different lengths, the removal effect is better.

[0029] A preferred embodiment, combined with Fig.10 and Fig.11 As shown, a liquid supply chamber 504 and an air supply chamber 505 are respectively provided inside the shell 502, and a plurality of liquid outlets 506 are provided on the liquid supply chamber 504, which are connected with the liquid supply device through a pipeline; a plurality of connecting holes 507 are provided on the air supply chamber 505, and the air supply chamber 505 is connected with an external air supply device, and the liquid outlets 506 and the connecting holes 507 are distributed between the scraper strips 503. When the cotton needs to be moistened, the liquid outlet 506 can be directly sprayed out without the need for the staff to operate again, thereby simplifying the construction process, and for the connecting hole 507 part, when it is necessary to clean the fluff on the metal strip 3, negative pressure adsorption is generated to pull the fluff off, and when it is necessary to clean the discharge pipe 101, its own holes, and the metal strip 3, a high-pressure blowing airflow is generated to perform the cleaning operation. Specific implementation method 2

[0030] Combination Fig. 9 As shown, the end of the discharge pipe 101 has a detachable end cap to facilitate the removal of cotton and to seal it during processing.

[0031] Specific working principle: Open the end cover on the left side of the machine body 1, put in the cotton, and then buckle it again to close it, start the air supply unit 4 and the dispersion component 6, blow up the cotton and shake it apart. At this time, the metal strip 3 is located in the discharge pipe 101. In order to ensure that all the cotton can be shaken apart, keep the air supply unit 4 to continuously supply air upwards, and then slide the metal strip 3 to the left and pull it out, and start to rotate. Under the action of centrifugal force, the metal strip 3 is in a stretched and dispersed state, and then during the movement, it rotates synchronously to lift up the cotton that has not been blown up, thereby ensuring the separation quality. The air supply unit 4 Intermittent air supply is generated to make the cotton continuously rush toward the rope body 605. At this time, the first hydraulic cylinder 601 can be used to push the cross support plate 602 to move up and down as a whole to improve the impact separation effect. The separated debris falls into the installation channel 102 under the action of gravity and falls out from the slag discharge port 103. After the separation is completed, the buckling plate 104 reduces the space, and the metal strip 3 is used to complete the collection work, and the cleaning component 5 is used for cleaning, which greatly improves the work efficiency, shortens the waiting time required for the experiment, and can cope with large-scale cotton separation operations.

[0032] Experimental Method 1 Sample solution preparation Take about 10g of processed cotton, moisten it in advance, put it in a mortar, and slowly grind it until there is no obvious floc. Collect the samples and transfer them to a clean culture dish. Dry them at 30℃ until they are dry. Collect the cotton samples and store all the samples in sealed bags at room temperature.

[0033] Weigh 0.3g (accurate to 0.001g) of cotton sample into the inner liner of a polytetrafluoroethylene digestion tank, add 5mL nitric acid and 1mL hydrogen peroxide, cold digest overnight, cover the lid and tighten it appropriately, place it in a microwave digestion instrument for digestion (refer to Table A.2 for digestion conditions), and after the digestion is completed, dilute to a 25mL volumetric flask, mix well and set aside, and make a blank solution at the same time. The sample solution can be diluted as needed if it exceeds the standard series concentration.

[0034] It should be understood that the above specific embodiments of the present invention are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modification, equivalent substitution, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A cotton testing sample processing device, characterized in that: include: A machine body (1), wherein a power assembly (2) is provided on the left side of the machine body (1), the right end of the power assembly (2) is located inside the machine body (1), and a plurality of elastic metal strips (3) are evenly provided along the circumferential direction, a plurality of air supply portions (4) are provided at the bottom of the machine body (1), a discharge pipe (101) communicating with the inside is provided on the right side of the machine body (1), a cleaning assembly (5) is symmetrically provided at the discharge pipe (101), and a dispersion assembly (6) is provided at the top of the machine body (1).

2. A cotton testing sample processing device according to claim 1, characterized in that: The power assembly (2) comprises a driving shaft (201) and a sliding sleeve (202); a control motor (203) connected to the machine body (1) is provided at one end of the driving shaft (201), and the other end extends into the discharge pipe (101), and an adjustment rod (204) is provided on the machine body (1) above the driving shaft (201); the sliding sleeve (202) is slidably connected to the driving shaft (201), and a middle piece (205) connected to the adjustment rod (204) is provided at the left end, and the right end is fixedly connected to the metal bar (3).

3. A cotton testing sample processing device according to claim 2, characterized in that: A baffle (206) is provided at the right end of the sliding sleeve (202), the baffle (206) is close to the left end of the metal strip (3), and the diameter of the baffle (206) is equal to the diameter of the discharge pipe (101).

4. A cotton testing sample processing device according to claim 1, characterized in that: The bottom of the machine body (1) is provided with a plurality of installation channels (102); the air supply portion (4) comprises a base (401) and a support bar (402); the base (401) is fixed in the installation channel (102), and a plurality of air outlets (403) are evenly arranged above the base (401); a plurality of support bars (402) are used and arranged at a blanking opening of the installation channel (102), and the cross-sectional shape of the support bar (402) is circular.

5. A cotton testing sample processing device according to claim 4, characterized in that: Slag discharge ports (103) are provided at both sides below the installation channel (102), and a guide slope (404) is provided on the base (401).

6. A cotton testing sample processing device according to claim 1, characterized in that: The lower surface of the interior of the machine body (1) is semicircular, and rotatable buckle plates (104) are provided on both sides.

7. A cotton testing sample processing device according to claim 1, characterized in that: The dispersion component (6) includes a first hydraulic cylinder (601) and a cross brace (602); the first hydraulic cylinder (601) is installed on the top of the machine body (1), and the push rod is connected to the top of the cross brace (602); two air chambers (603) are symmetrically arranged on the cross brace (602), and each of the air chambers (603) is provided with an air hole (604); a plurality of elastic ropes (605) are arranged on the cross brace (602), and a triggering member (7) for triggering the vibration of the rope (605) is arranged in the middle of the cross brace (602).

8. A cotton testing sample processing device according to claim 7, characterized in that: The trigger member (7) comprises a hammer plate (701) and a power motor (702); a force column (703) and a sliding column (704) are respectively arranged above the hammer plate (701); the sliding column (704) is slidably connected to the cross brace plate (602), and a spring (705) is sleeved on the sliding column (704); the power motor (702) is installed above the cross brace plate (602), and a convex plate (706) is arranged on the power motor (702) to contact the top of the force column (703).

9. A cotton testing sample processing device according to claim 1, characterized in that: The discharge pipe (101) is symmetrically provided with a sliding channel (105); the cleaning assembly (5) comprises a second hydraulic cylinder (501) and a shell (502); the second hydraulic cylinder (501) is installed at the outlet end of the sliding channel (105), and is fixedly connected to the shell (502) at the push rod; the working surface of the shell (502) is an arc surface, and a plurality of flexible scraping strips (503) are evenly provided along the arc surface.

10. A cotton testing sample processing device according to claim 8, characterized in that: A liquid supply cavity (504) and an air supply cavity (505) are respectively provided inside the shell (502); the liquid supply cavity (504) is provided with a plurality of liquid outlets (506); the air supply cavity (505) is provided with a plurality of communication holes (507); the liquid outlets (506) and the communication holes (507) are distributed between the scraper strips (503).

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